2021 Audi A4 Technical Service Bulletins

1,057 technical service bulletins (TSBs) are on record for the 2021 Audi A4. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11025264Oct 7, 2025Other or unknown. This bulletin provides information on how to set up and use the FMC for obtaining vehicle software updates (SD Creator decomissioned).
• 11025256Oct 6, 2025Electrical system. This bulletin provides information when the function programmed to star button on multi-function steering wheel deletes itself.
• 11025245Oct 3, 2025Other or unknown. This bulletin provides information for when there is a fluid sample request from Product Support.
• 11025251Oct 1, 2025Other or unknown. Summary of all Vin-4-Pin topics: Brake pulsation MIB3 takes a long time to load at startup Difficult to fuel, EVAP canister part block P001700 crank-cam correlation MIL on: DTC U041800 drive motor coolant and gear oil contamination PPE/PPC time off by 1 hour
• 11025241Oct 1, 2025Other or unknown. This bulletin addresses complaints about the heated steering wheel, DTC B145504.
• 11025239Oct 1, 2025Suspension. This bulletin provides information when there are noises from the rear of vehicle - securing bump stops.
• 11023748Sep 30, 2025Other or unknown. This bulletin provides information when the steering wheel does not heat up sufficiently.
• 11023827Sep 29, 2025Other or unknown. This bulletin provides information when there is vibration/clacking/boomingnoises when driving due to foreign objects.
• 11023773Sep 29, 2025Suspension. This TSB provides informaiton pertaining to noises from the guide link bush.
• 11023772Sep 29, 2025Suspension. This bulletin provides information on locating noises coming from the suspension.
• 11023738Sep 29, 2025Suspension. This bulletin provides information when there are rumbling noises from the suspension - upper link rubber mounting.
• 11023755Sep 26, 2025Electrical system. This bulleitn provides information whent here are complaints about route guidance with Navigation.
• 11023739Sep 26, 2025Transmission and drivetrain. This bulletin provides information when the starter/generator drive belt is noisy or came off.
• 11023767Sep 25, 2025Steering. This bulletin provides information when there is a prompt to take over steering; hands off detection.
• 11023741Sep 23, 2025Body and structure. This bulletin provides information when there is cracking/creaking noises during load changes or severe vehicle body torsion.
• 11023814Sep 12, 2025Electrical system. This bulletin provides information when there is an installation error for Audi connect.
• 11023742Sep 12, 2025Body and structure. This bulletin provides information when the air conditioning cooling output is insufficient; leak on air conditioning system evaporator.
• 11023811Sep 11, 2025Other or unknown. This bulletin provides sevice info regarding the bluetooth connection with an Apple iPhone.
• 11023749Sep 11, 2025Other or unknown. This bulletin provides information related to the VIN-4-PIN Program.
• 11023744Sep 10, 2025Electrical system. This bulletin provides information when there is a tail light warning and variois DTCs are stored in the comfort module; B16D431, B16D631, B16D531, and/or B16D731.
• 11023740Sep 10, 2025Body and structure. This bulletin provides information when there is cracking/creaking noises during load changes or severe vehicle body torsion.
• 11023734Sep 10, 2025Visibility (wipers, defrost, mirrors). This bujlletin provides information regarding the GFF test plan required for A/C compressor replacements regardless of the concern.
• 11023800Sep 9, 2025Electrical system. This bulletin provides workshop information for fault findinga nd repair for the electric tailgate.
• 11023771Sep 8, 2025Other or unknown. This bulletin provides a deployment overview for customer service packages MLB and MQB for MIB3/connectivity box/OCU3/LSR.
• 11023743Sep 8, 2025Electrical system. This bulletin provides information when there is a pixel error (color ful line) in the Audi virtual cockpit.
• 11022715Aug 29, 2025Other or unknown. This bulletin provides tips for improving the robustness of the Bluetooth and CarPlay connection.
• 11022710Aug 29, 2025Body and structure. This bulletin provides information for when there are scratches or a coating on the cover of the instrument cluster, or there are particles or insects inside of the housing.
• 11022707Aug 29, 2025Electrical system. This bulletin provides an MMI software update for MIB3 vehicles.
• 11022704Aug 28, 2025Body and structure. This bulletin provides information when there is corrosion on the tailpipes.
• 11022698Aug 26, 2025Electrical system. This bulletin provides information for wire harness repairs and documentation.
• 11022671Aug 19, 2025Body and structure. This bulletin provides information when the front seat makes creaking/squeaking noises.
• 11022664Aug 19, 2025Other or unknown. This bulletin provides information about professional noise analysis with the VAS 611 015 PICO-NVH tool
• 11022689Aug 15, 2025Visibility (wipers, defrost, mirrors). This bulletin provides information when there DTC P218500 is stored in temerature sender G83.
• 11022669Aug 15, 2025Transmission and drivetrain. This bulletin provides informaoitn when there is droning noises/vibrations in tight corneres, in vehicles that have quattro with ultra technology.
• 11022668Aug 15, 2025Other or unknown. This bulletin provides information when the horn sound quality is poor.
• 11022634Aug 2, 2025Electrical system. This bulletin provides information when there are no services in the MMI and the SOS LED does not turn green after PDI.
• 11022645Aug 1, 2025Body and structure. This TSB provides service information regarding noises from the sliding sunroof.
• 11022633Aug 1, 2025Other or unknown. This bulleitn provides information regarding UV Leak additive for finding oil leaks.
• 11022630Aug 1, 2025Other or unknown. This is a notice for software changes with the ODIS diagnostic program to correct the communication during vehicle programming function: The hotfix is to correct the issue: Issue seen: ODS5003E Infrastructure Guided Fault Finding: An internal fatal error occurred during the G929 - Vehicle Interior Carbon Dioxide Concentration Sensor function test plan. NOTE: This ODS error could show up on any other GFF function…
• 11021454Jul 31, 2025Electrical system. This bulletin provides information when the display of guages is faulty in Audi virtual cockpit.
• 11021446Jul 31, 2025Electrical system. This bulletin provides information when the Audi virtual cockpit display has semi-circular marks on edges of the display.
• 11021439Jul 31, 2025Electrical system. This TSB provides information when the Audi advanced key is inoperative; door handle touch sensors.
• 11021441Jul 30, 2025Transmission and drivetrain. This bulletin providesi nformation when various DTCs are stored; high maximum temperature recorded for clutch K1.
• 11021438Jul 25, 2025Electrical system. This TSB provides informatin when the cigarette lighter element does not eject, or the cigarette lighter is inoperable.
• 11021480Jul 22, 2025Other or unknown. This bulletin provides information when a customer reports that poor voice quality via bluetooth with iOS 18.0.x - 18.4.x.
• 11021444Jul 22, 2025Body and structure. This bulletin provides information when the air conditioning cooling output is insufficient; leak on air conditioning system evaporator.
• 11021473Jul 18, 2025Body and structure. This TSB provides information related to billing regarding billing for a broken sunroof glass panel.
• 11021455Jul 15, 2025Transmission and drivetrain. This bulletin provides informaoitn when there is droning noises/vibrations in tight corneres, in vehicles that have quattro with ultra technology.
• 11021442Jul 15, 2025Electrical system. This bulletin provides information when there are no services in the MMI and the SOS LED does not turn green after PDI.
• 11021452Jul 10, 2025Body and structure. This bulletin provides information when there are noises after selecting a gear while the vehicle is idling and stationary, or while driving.

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